Effective Multi-Cloud Storage inCloud

Concept

The end of this decade is marked by a paradigm shift of the industrial

information technology towards a pay-per-use service business model known as

cloud computing. Cloud data Storage redefines the security issues targeted on

customer’s outsourced data (data that is not stored/retrieved from the costumers

own servers). In this work we observed that, from a customer’s point of view,

relying upon a solo SP for his outsourced data is not very promising. In addition,

providing better privacy as well as ensuring data availability can be achieved by

dividing the user’s data block into data pieces and distributing them among the

available SPs in such a way that no less than a threshold number of SPs can take

part in successful retrieval of the whole data block. In this paper, we propose a

secured cost-effective multi-cloud storage (SCMCS) model in cloud computing

which holds an economical distribution of data among the available SPs in the

market, to provide customers with data availability as well as secure storage. Our

results show that, our proposed model provides a better decision for customers

according to their available budgets.

Objectives

Without any concerns for efficient storage mechanisms and maintainability issues with large amounts of data storage.

Cloud data storage also redefines the security issues targeted on customer’s outsourced data.

ARCHITECTURE:

NEED FOR THE STUDY :

Privacy preservation and data integrity are two of the most critical security

issues related to user data. In conventional paradigm, the organizations had the

physical possession of their data and hence have an ease of implementing better

data security policies. But in case of cloud computing, the data is stored on an

autonomous business party that provides data storage as a subscription service. The

users have to trust the cloud service provider (SP) with security of their data. In,

the author discussed the criticality of the privacy issues in cloud computing, and

pointed out that obtaining information from a third party is much easier than from

the creator himself. Following the pattern of paradigm shift, the security policies

also evolved from the conventional cryptographic schemes applied in centralized

and distributed data storage, for enabling the data privacy.

Problem Statement:

This service does not only provide flexibility and scalability for the data

storage.

Proposed Study:

We proposed an economical distribution of data among the available SPs in the

market, to provide customers with data availability as well as secure storage. In our

model, the customer divides his data among several SPs available in the market,

based on his available budget. Also we provide a decision for the customer, to

which SPs he must chose to access data, with respect to data access quality of

service offered by the SPs at the location of data retrieval. This not only rules out

the possibility of a SP misusing the customers’ data, breaching the privacy of data,

but can easily ensure the data availability with a better quality of service.

Our proposed approach will provide the cloud computing users a decision

model, that provides a better security by distributing the data over multiple cloud

service providers in such a way that, none of the SP can successfully retrieve

meaningful information from the data pieces allocated at their servers. Also, in

addition, we provide the user with better assurance of availability of data, by

maintaining redundancy in data distribution. In this case, if a service provider

suffers service outage or goes bankrupt, the user still can access his data by

retrieving it from other service providers.

In this project to mitigate the threats facing cloud storage, we extended the cloud data storage to include multiple service providers, where each cloud storage represents a different service provider. Our motivation behind such an extension is that, the adversary, similar to any other cloud user, is abstracted from the actual clouds of servers implemented by different cloud service provider. One of the obvious objectives in this scenario is to minimize the cost of storage of the data pieces over service providers.

Scope of the Study :

We consider the storage services for cloud data storage between two entities, cloud user and cloud service providers. The cloud storage service is generally priced on two factors, how much data is to be stored on the cloud servers and for how long the data is to be stored. In our model, we assume that all the data is to be stored for same period of time. We consider number of cloud service providers each available cloud service provider is associated with a factor, along with its cost of providing storage service per unit of stored data. Every has a different level of quality of service offered as well as a different cost associated with it. Hence, the cloud user can store his data on more than one according to the required level of security and their affordable budgets.